openpiano.control
Class MidiTimer

java.lang.Object
  openpiano.control.MidiTimer

All Implemented Interfaces:

Runnable

public class MidiTimer
extends Object
implements Runnable

MidiTimer is the central clock of the application. It controls the speed of notes and sets their position

Version:

1.0, 07/30/08

Author:

Sascha Westermann

Constructor Summary

MidiTimer(Controller controller, SlidePanel slidePanel, LinkedList<Bpm> bpmList, int tpb, float factor)
Constructs a new MidiTimer based on conditions from a MIDI file

Method Summary

float	getBeatsPerMinuteFactor() Returns the current beats per minute factor
long	getElapsedTicks() Returns the elapsed ticks of the current MIDI file
long	getTicksPerBeat() Returns the ticks per beat defined in the MIDI file
long	getTicksPerSecond() Returns the ticks per second defined in the MIDI file
void	initTimer() Initializes the MidiTimer
boolean	isRunning() Returns true if the MidiTimer thread is running
void	run() Updates the application according to the time passed by.
void	seek(boolean seek, float factor) Sets the seek mode and speed.
void	setElapsedTicks(float ticks) Sets the actual position in the MIDI file
void	startTimer() Starts the MidiTimer
void	stopTimer() Stops the MidiTimer
void	updateBpm() Updates beats per minutes according to the position
void	updateBpm(float factor) Updates beats per minutes according to the position based on a given factor

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MidiTimer

public MidiTimer(Controller controller,
                 SlidePanel slidePanel,
                 LinkedList<Bpm> bpmList,
                 int tpb,
                 float factor)

Constructs a new MidiTimer based on conditions from a MIDI file

Parameters:

controller - the main controller of the application

slidePanel - the panel containing the position slider

bpmList - a list of timed speed-changing events according to the MIDI file

tpb - the amount of ticks per beat according to the MIDI file

factor - a speed factor for beats per minute

Method Detail

getBeatsPerMinuteFactor

public float getBeatsPerMinuteFactor()

Returns the current beats per minute factor

Returns:

the current beats per minute factor

getElapsedTicks

public long getElapsedTicks()

Returns the elapsed ticks of the current MIDI file

Returns:

the elapsed ticks

getTicksPerBeat

public long getTicksPerBeat()

Returns the ticks per beat defined in the MIDI file

Returns:

the ticks per beat

getTicksPerSecond

public long getTicksPerSecond()

Returns the ticks per second defined in the MIDI file

Returns:

the ticks per second

initTimer

public void initTimer()

Initializes the MidiTimer

isRunning

public boolean isRunning()

Returns true if the MidiTimer thread is running

Returns:

true if the MidiTimer thread is running

run

public void run()

Updates the application according to the time passed by. This is the central clock dealing with timed events like moving blocks and the slider position

Specified by:

run in interface Runnable

seek

public void seek(boolean seek,
                 float factor)

Sets the seek mode and speed. Used for rewind and fast forward

Parameters:

seek - true if seeking, false if resume

factor - speed-factor of seeking

setElapsedTicks

public void setElapsedTicks(float ticks)

Sets the actual position in the MIDI file

Parameters:

ticks - current tick position

startTimer

public void startTimer()

Starts the MidiTimer

stopTimer

public void stopTimer()

Stops the MidiTimer

updateBpm

public void updateBpm()

Updates beats per minutes according to the position

updateBpm

public void updateBpm(float factor)

Updates beats per minutes according to the position based on a given factor

Parameters:

factor - speed-factor